Tinnheia is a district in the city of Kristiansand in Agder county, Norway.

It is part of the borough of Grim, and it is generally populated with mostly apartment homes, with a high percentage of immigrants.

The district of Tinnheia includes an industrial area called Hannevika.

Public transport is available by Agder Kollektivtrafikk, stops at Tinnheia are located along Line 15 which goes from Kvadraturen-Tinnheia-Kvadraturen 4 times every hour.

Tinnheia has the second-most apartment buildings in Kristiansand after Kvadraturen (the city centrum).